Middle Paleozoic global-ocean redox trends based on uranium isotopes from marine limestones and their relationship to paleobiologic, carbon-cycle, and climatic changes

Maya Elrick, University of New Mexico Main Campus, Albuquerque, NM, United States, Geoffrey J Gilleaudeau, George Mason University Fairfax, Atmosphere, Oceans, and Earth Sciences, Fairfax, United States, Stephen J Romaniello, University of Tennessee, Knoxville, NY, United States, Chadlin M Ostrander, Arizona State University, School of Earth and Space Exploration, Tempe, AZ, United States, Thomas J Algeo, University of Cincinnati, Department of Geology, Cincinnati, OH, United States and Jennifer L Morford, Franklin & Marshall College, Lancaster, PA, United States